Tool for flanging pipe.



PATENTED VJULY 2l, 1903.

L. D. LUVEKIN. TOOL PoR PLANGING PIPE.

APPLIQATION FILED MAB.. 28, .1902.

2 SHEETS-SHEET 1.

N0 MODEL.

PATBNTED JULY 21, 1993.

L. D. LOVBKIN. TOOL POR PLANGING PIPE.

APPLIOATION FILED MAR. 2a, 1902.

2 SHEETS-SHEET 2.

N0 MODEL.

Patented July 21, 1905;.

'PATENT OFFICE.

LUTHER D. LOVEKIN, OF PHILADELPHIA, PENNSYLVANI.

TOOL FOR FLANGING PIPE.

. .SPECIFICATION forming part of Letters Patent No. 734,273, dated muy 2i, 190e:

Application tiled March 28, 1902- lSerial No. 100,353. (No model.)

To ttZZ whom it may concern:

Be it known that I, LUTHER DANIEL LovE- KIN, of the city and county ofY Philadelphia and State of Pennsylvania, have invented an Improvement in Tools for Flanging Pipe, of which the following is a specification.

My invention has reference to tools for flanging pipe; and it consists of certain improvements fully set forth in the following specification and shown inthe accompanying drawings, which form a part thereof.

The object of my invention is the provision of a simple and efficient tool capable of being easily and expeditiously handled to expand and flange the ends of pipes or tubes of sheet metal and more especially those of compara-r tively small diameters.

My invention is more particularly an improvement upon the type of flanging-machine set out in Letters Patentto me, No. 682,726,

dated September 17 1901, and is distinguished therefrom principally in expanding rollers and the manner of supporting and operating them.

In carrying .out my invention I provide a suitable mandrel adapted to be operated in any convenient manner, the lower end of which is furnished with expanding rollers, which are preferably' made slightly tapered. Within the mandrel I'arran ge a follower car rying upon its lower end a tapered roller adapted to press upon the expanding-rollers for the purpose of causing them to spread as the work may require and also to reduce their resistance to rotation upon their own axes. This tapered follower-roller is, moreover, supported bythe follower-shaft in such a manner that its end thrust may be taken up by antifriction devices. The structure is designed to secure the desired results with the least expenditure of power and also with the simplest practicable construction of the operative parts making up the organized tool.- The mandrel is further provided with flangingrollers located upon its-'outer surface at a considerable distance from its end for the purpose of flanging the free edges of the expanded tube end, and thereby secure it in position within a pipe-flange. The follower is arranged to be fed gradually in a longitudinal direction through the mandrel to shift the position of the follower-roller relatively to y the expanding-rollers, and its movement may be secured and regulated by hand manipulation, as pointed out hereinafter. Y The details of construction will be better understood by reference to the drawings, in whlch- Figure 1 is a sectional elevation of an expanding and fianging 'tool embodying my invention. Fig. 2 is a cross-section of the same on line 2 2 of Fig. 1. Fig. 3 isa cross-section of the same on line 3 3 of Fig. 1 looking upward. Fig. 4 is a cross-section of the same on line 4 4 of Fig. 1. Fig. 5 is an elevation of amodified form of expanding-rolls. Fig. 6 is a sectional elevation of a pipe and ange after the pipe is expanded or flanged. Fig. 7 is an elevation of two complete pipe ends and flanges united, and Fig. S is a sectional elevation of a portion of the mandrel and follower-shaft.

2 is the mandrel and is in the main a cylindrical body, hollow or tubular on the lower part, as at 7 and 28,' and having its upper portion terminating in a tapered shank 33 and flattened end adapted to be received and held in the tail-stock of a turret-lathe or other tool suitable for the purpose of supporting it. The particular shape of the shank is immaterial and would be made to suit the tool available. The mandrel-body is made of two parts screwed together at 29. This middle portion 29 of the mandrel is slotted, as at 13, and the upper portion of its body immediately above the slot is screw-threaded and provided with a nut 17. A controllerring 15, provided with suitable handles or parts for the operator to grasp, is loosely sleeved over the mandrel-body and j ournaled in bearings 16 on the mandrel and 18 on the nut 17. In this manner the controller-ring may be freely rotated. for purposes to be set out later on. The mandrehbody is bored through almostrto the shank 33 and is fitted with a vertically-adjustable follower-shaft 9, having at its upper end a transverse key 20, which is guided in the vertical slots 13 of the mandrel, so as to prevent it from turning within the mandrel, the ends of said key projecting beyond the mandrel-body and connecting with the controller-rin g by means of screw-threads upon the outer ends of the key engaging screw-threads 19 on the internal face of the IOO ring. It will now be seen that by turning the controller-ring while the mandrel is stationary the follower-shaft will be caused to move longitudinally through the mandrel.

The lower end of the follower-shaft 0 is reduced in diameter to form a spindle, as at S, and is extended downward into the space 7 of the mandrel. This reduced portion constitutes a spindle upon which is loosely sleeved a conical or tapered roller l0, the taper of which is downward or toward the end of the mandrel. \Vl1en this roller is retracted within the space 7, it is practically inclosedaud protected within the mandrel. It may be removed from the spindle when necessary by removing a nut l2 on the end of the spindle and which normally holds the tapered roller in place. As this roller l0 is subjected to heavy strain in an upward direction, I find it most important to provide means to take this thrust with the least possible liability of wear from friction. 'lo this end I provide the follower with a series of antifriction-rings ll of a diameter preferably equal to the diameter of the larger or body portion of the follower and encircling the spindle S thereof, so as to be interposed between the end of the large portion 9 of the follower and the end of the roller l0.

The lower end of the mandrel is provided with expanding-rollers 3, preferably three in number, said rollers being tapered with the taper directed upward. They are also provided with journals 4, guided in radial bearings 5 and 6, formed in the wall of the mandrel and respectively above and below openings or apertures through which the body of the rollers 3 extend, the same touching the tapered roller l0 on their inner faces and having their outer faces projected beyond the outer surface of the mandrel. These radial bearings 5 and (5, or at least one set of them, open inwardly, so as to permit the Hangingrollers 3 to be placed in position from the inside of the mandrel and before the roller lO of the follower is placed upon the spindle S. As the taper on the rollers 3 is inversely that upon the follower-roller l0, it is evident that as the former roll upon the latter in the expanding operation the outer or active faces or expanding-surfaces are parallel to the axis of the follower, and consequently the expanded tube or pipe will retain a cylindrical shape during the expanding operation and at its completion.

The expanding-rollers 3 maybe made with plain or smooth surfaces or may have roughened or knurled periphcries, as shown in Fig. 5, as desired.

It is preferable that there shall be some play between the roller .l0 and its spindle S to allow the roller to adjust itself to the rollers 3 and the tube should the spindle not be in true center of the tube, it not being necessary to have a close iit of the roller lO upon its spindle to secure good expanding results.

The hollow or space 7 of the mandrel is considerably deeper than the length of the Hanging-rollers 3, so as to provide space for the reception of the follower-roller l0 when retracted above said expandingrollers,as shown in Fig. l. The rollers 3 are held in position within the mandrel by the tapered followerroller l0, thus simplifying the construction as far as possible.

At some distance above the rollers 3 the outer portion of the mandrel 2 is provided with annular bosses 25, which are perforated, and the mandrel is slotted at preferably three places 26, cquidistant about the mandrel and desirably above or in longitudinal alinement with the expanding-rollers 3. The slots 2G open through the mandrel into the hollow space 28 within the same. Into the boss above each of the recessed portions is serewed,at 24 ,inclined spindles 2b,tl1elowerends of which are stepped in the mandrel-body. J ournaled upon these spindles 23 are the Hanging-rollers 2l. In this manner the Hanging-rollers are adapted t0 r0- tate on oblique axes and the three Hangingrollers,in eifect,have their axes radiating from the same point of the axis of the mandrel. However, this is only necessary when the several Hanging-rollers are the same size and shape. To reduce the friction, these rollers 2l rest upon antifriction-collars 27, arranged between their upper portion and the under surface of the bosses 25. The outer or Hanging surface of these rollers 2l is tapered longitudinally of the roller, giving them a conical shape, so as to cause the metal of the tube to be Hanged in the form of a conical surface, as clearly shown in Fig. 6. While I prefer this type of Hanging-roller, I do not confine myself thereto, as the Hanging may be done in other shapes to suit the character of the work to be performed.

'lo reduce the friction and take up the thrust of the Hanging-rollers 2l, I provide a conical alltifrietion or thru st lroller 30, located within the hollow space 28 of the mandrel and through which the follower-shaft 9 loosely passes. The Hanging rollers 2l press at points equidistant upon this roller 30, thus centralizingit. As it is thus pressed upward this end thrust is received upon antifrietioncollars 3l, held in place by a spacing-block 32, also located within the chamber or space 28. It is evident that the roller 30 might, if desired, fill the whole of the space 2S,dis pensing with the spacing-block.

Secured to the side of the mandrel 2 is a trimming-tool or cutter 34 for the purpose of trimming the edge of the Hanged pipe or tube to make it true with the surface of the pipeflange, as shown in Fig. e', so that two such pipes and flanges may be clamped tight-ly together, as in Fig. 7. This trimming-tool or cutter 3l is clamped to the mandrel by a screw extending through a slot in the eutter, as shown in Fig. l., so that the cutter may be adjusted to suit the requirements due to variations in thickness of metal to be flanged which would change the relative positions of lll IIO

parts are clamped in the face-plate of the lathe and adapted to be rotated. The end of the mandrel 2 is then inserted into the tube,

and while the latter rotates the controller-v ring 15 is turned by hand, with the object of moving the follower and its roller l0 toward the tube and the expanding-rollers 3 within it. The result of this is that the metal of the ytube 35 is expanded to fit tightly into the bore of the flange 3S, as shown in Fig. 6. In this operation the rollers rotate by frictional contact with the pipe or tube 35 and their rotation is accomplished with but little friction, first, because of the freedom to rotation of the roller l0 of the follower, due to the use of the antifriction rings or collars 1l, and, secondly, because the thrust of the rollers 8 is received upon a rotating body. Then the expansion of the tube has been completed, the controllerring is rotated in a reverse direction and the pressure by the rollers 3 relieved. The mandrel is then advanced within the tube and guided therebyT until the flanging-rollers 2l touch the outwardly-eX tending edge of the tube. The tail-stock and tool are then moved gradually toward the tube and flange 3S, and the result is that the rollers 2l gradually flange outwardly the edge of the tube, as shown in Fig. 6, causing it to fit tightly down upon the conical edge of the flange-ring, as at 37. Simultaneously with this ilanging operation the-cutter 34C on the mandrel turns off the surplus metal from the flanged end of the tube and-makes it perfectly flat and true with the upper surface of the flange, as shown in'Fig. 6.

Now while I have described my invention as adapted to be used in the lathe of the turret or other suitable type it is lo be understood that the' same results can be secured by revolving the tool and holding the pipe or tube stationary, or both may have rotary motion given to them. My invention is independent of the particular means employed for holding the tool, and is not to be restricted thereby.

While I prefer'the construction shown as being excellently adapted for the purposes of my invention, I do not limit myself to the details, as they may be modified without departing from the spirit of the invention.

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. In a tool for expanding tubes, the combination of a mandrel adapted to be held when using the tool, expanding-rollers carried by themandrel and adapted to project beyond the outer surface thereof, a lon gitu dinally-adj ustable and non-rotatable follower carried by the mandrel and having a shouldered spindle,a tapered roller j ournaled upon the spindle of the follower and moved thereby and adapted to receive the thrust of the expanding-rollers when in the act of expanding the tube, anfifrictioncollars surrounding the spindle and between the tapered roller and shoulder of the follower and a trimming-tool or cutter carried by the mandrel.

2. In a tool for expanding tubes, the combination of a mandrel adapted to beheld when using the tool, tapered expanding-rollers carried by the mandrel and adapted to project beyond the outer surface thereof, a longitudinallyadj u stable follower carried by the mandrel, a tapered roller journaled upon the fol lower and moved thereby and adapted to receive the thrust of the eXpandin g-rollers when 'in the act of expanding the tube the taper of the follower-roller being inverse to that of the expanding-rollers, flanging-rollers carried by the mandrel above the expanding-rollers, and a trimming-tool or cutter secured to the mandrel in transverse alinement with the flanging-rollers.

In a tool for expanding tubes, the combination of a mandrel adapted to be held when using the tool, expanding-rollers carried by the mandrel and adapted lto project beyond the outer surface thereof, a longitudinallyadjustable follower carried by the mandrel, a tapered roller j ournaled upon thefollower and moved thereby and adapted to receive the thrust of the eXpandin g-rollers when 'in the act of expanding the tube, antifriction-bearings between the end of the follower-roller and the follower, means to move the follower longitudinally through the mandrel, flanging-rollers journaled to the mandrel on oblique axes, and an antifriction thrust-roller within the mandrel for receiving the thrust of the flanging-rollers. A

ICO

4. In a tool for flanging tubes., the combination of a hollow mandrel adapted to be held when using the tool, Hanging-rollers carried by the mandrel and projecting beyond the outer surface thereof, and a tapered roller journaled within the mandrel and adapted to receive the thrust of the flan ging-rollers when in Jf -he act of flanging the tube. 5. In a tool for flanging tubes, the combination of a hollow mandrel adapted to be held when using the tool, hanging-rollers carried bythe mandrel and projecting beyond the outer surface thereof, a tapered roller jour'- naled within the mandrel and adapted to receive the thrust of the hanging-rollers when in act of flanging the tube, and a trimming-tool or cutter attached to the mandrel in transversealinement with the hanging-rollers.

6. In a tool for flanging tubes, the combination of a hollow mandrel adapted to be held whenV using the tool, Hanging-rollers carried by the mandrel and projecting beyond the outer surface thereof, a tapered roller journaled within the mandrel and adapted to receive the thrust of the Hanging-rollers when in act of Hanging the tube, and antifrictionbearings between the end of the tapered roller and the mandrel consisting of a series of rings or collars resting upon each other.

7. In a tool for Hanging pipe, the combination of a hollow mandrel to enter the pipe, Hanging-rollers carried inthe annular wall of the mandrel, a tapered thrust-roller within the hollow mandrel and adapted to receive the thrust of the Hanging-rollers and support them in the act of Hanging the tube, and means for centering the thrust-roller in the mandrel.

S. In a tool for Hanging and expanding tubes, the combination of a mandrel adapted to be held when using the tool, expandingrollers carried by the mandrel and adapted to project beyond the outer surface thereof, a longitudinally-adjustable follower carried by the mandrel, a tapered roller journaled upon the follower and moved thereby and adapted to receive the thrust of the expanding-rollers when in the act of expanding the tube, one or more Hanging-rollers journaled upon the mandrel at considerable distance from its end so as to be out of transverse alinement with the expandingrollers, and a thrust-roller within the mandrel for receiving the thrust of the Hanging-rollers.

9. In a tool for Hanging and expanding tubes, the combination of a mandrel adapted to be held when using the tool, expandingrollers carried by the mandrel and adapted to project beyond the outer surface thereof, a longitudinally-adjustable follower carried by the mandrel, a tapering roller j ournaled upon the follower and moved thereby and adapted to receive the thrust of the expanding-rollers when in the act of expanding the tube, one or more Hanging-rollers having conical surfaces journaled upon the mandrel on oblique axes at a considerable distance from its end so as to be out of4 transverse alinement with the expanding-rollers, and a tapered thrustroller within the mandrel for receiving the thrust of the Hanging-rollers.

l0. In a tool for Hanging pipe, the combination of a mandrel, a series of Hanging-rollers presenting oblique outer surfaces carried by the mandrel for spreading the tube end into substantially conical form, and a trimming or cutting tool secured to the mandrel in transverse alinement with the Hangi 11g-rollers for trimming the Hanged end of the pipe simultaneously with the Hanging of the same.

ll. In a tool for Hanging pipe, the combination of a mandrel, a series of Hanging-rollers presenting oblique outer surfaces carried by the mandrel for spreading the tube end into substantially conical form, and an adjustable trimming or cutting tool secured to the mandrel in transverse alinement with the Hanging-rollers for trimming the flanged end of the pipe simultaneously with the Hanging of the same.

12. In a tool for Hanging pipe, the combination of a hollow mandrel, aseries of Hangingrollers carried by the mandrel, a central thrust-roller within the mandrel and against which the Hanging rollers rest and upon which they revolve when doing their work of Hanging' the tube, and a central support for the central roller for supporting it within the mandrel but out of contact with its interior walls.

I3. In a tool for Hanging and expanding tubes, the combination of the mandrel adapted to be held when using the tool, expandingrollers carried by the mandrel and adapted to project beyond the outer surface thereof, a longitudinally-adjustable follower carried by the mandrel, a tapered roller journaled upon the follower and moved thereby and adapted to receive the thrust of the expanding-rollers when in the act of expanding the tube, one or more Hanging-rollers journaled upon the mandrel on oblique axes at a considerable distance from its end so as to be out of transverse alinement with the expanding-rollers, a thrust-roller within the mandrel for receiving the thrust of the Hanging-rollers, and a trimming-tool or cutter secured to the mandrel in transverse alinement with the Hangii'ig-rollers.

l-l. In a tool for Hanging pipe, the combination of a hollow mandrel, a series of Hangingrollers carried by the mandrel, and a central thrust-roller Within the mandrel and against which the Hanging-rollers rest and upon which they revolve when doing their work of Hanging the tube.

In testimony of which invention I have hereunto set my hand.

L. D. LOVEKIN.

Witnesses:

R. M. HUNTER, GEORGE H. EIMERT. 

